Viessmann VITODENS 242-F Installation And Service Instructions Manual page 91

"Heating circuit ..."
Coding
Coding in the delivered condition
Economy function outside temperature
A5:5 With heating circuit pump
logic function (economy
control): Heating circuit
pump "OFF" when the
outside temperature (AT)
is 1 K higher than the set
room temperature (RT
AT > RT
Parameter address
A5:...
1
2
3
4
5
6
7
to
15
Coding in the delivered condition
Extended economy function adjusted outside temperature
A6:36 Extended economy mode
disabled
(cont.)
Possible change
A5:0
A5:1
to
A5:15
)
set
+ 1 K
set
With heating circuit pump logic function: Heating cir-
cuit pump "OFF"
AT > RT + 5 K
set
AT > RT + 4 K
set
AT > RT + 3 K
set
AT > RT + 2 K
set
AT > RT + 1 K
set
AT > RT
set
AT > RT – 1 K
set
AT > RT – 9 K
set
Possible change
A6:5
to
A6:35
Code 1
Without heating circuit
pump logic function
With heating circuit pump
logic function: Heating cir-
cuit pump "OFF"; see fol-
lowing table
Extended economy control
enabled, i.e. the burner and
heating circuit pump stop
and the mixer is closed at a
variable value, adjustable
between 5 and 35 °C plus
1 °C. The base value is the
adjusted outside tempera-
ture. This value is based on
the actual outside temper-
ature and a time constant
which takes into account
the cooling down of an
average building.
91